PUBLIC LAW 95-95—AUG. 7, 1977
91 STAT. 7(S7
to the Congress not later than June 1, 1979, and before June 1 of each third year thereafter. "(ii) On the basis of such study and sUch other information as is available to him (including the studies under section 214), the Admin- Infra istrator may, after notice and opportunity for a public hearing, promulgate regulations under paragraph (1) of this subsection changing any standard prescribed in subparagraph (A) (ii) (or revised under subparagraph (B) or previously changed under this subparagraph). No such changed standard shall apply for any model year before the model year four years after the model year during which regulations containing such changed standard are promulgated, " (F) For purposes of this paragraph, motorcycles and motorcycle Motorcycle engines shall be treated in the same manner as heavy-duty vehicles classification. and engines (except as otherwise permitted under section 206(f)(1)) Ante, p. 758. unless the Administrator promulgates a rule reclassifying motorcycles as light-duty vehicles within the meaning of this section or unless the Administrator promulgates regulations under subsection (a) applying standards applicable to the emission of air pollutants from motorcycles as a separate class or category. In any case in which such standards are promulgated for such emissions from motorcycles as a separate class or category, the Administrator, in promulgating such standards, shall consider the need to achieve equivalency of emission reductions between motorcycles and other motor vehicles to the maximum extent practicable.". (b) Section 202(b)(3) of such Act is amended by adding the follow- "Heavy duty vehicle." ing new subparagraph at the end thereof: "(C) The term 'heavy duty vehicle' means a truck, bus, or other 42 USC 7521. vehicle manufactured primarily for use on the public streets, roads, and highways (not including any vehicle operated exclusively on a rail or rails) which has a gross vehicle weight (as determined under regulations promulgated by the Administrator) in excess of six thousand pounds. Such term includes any such vehicle which has special features enabling off-street or offhighway operation and use.". (c) Section 312 of such Act is amended by inserting "AND STUDIES Use of costor cosT-EFTECTivENESs ANALYSES" at the end of the heading thereof and effectiveness, study. by adding the following new subsection at the end thereof: "(c) Not later than January 1, 1979, the Administrator shall study 42 USC 7612. the possibility of increased use of cost-effectiveness analyses in devising strategies for the control of air pollution and shall report its rec- Report to ommendations to the Congress, including any recommendations for Congress. revisions in any provision of this Act. Such study shall also include Contents. an analysis and report to Congress concerning whether or not existing air pollution control strategies are adequate to achieve the purposes of this Act." (d) Part A of title II of such Act is amended by redesignating section 214 as section 216 and by inserting after section 213 the fol- 42 USC 7550. lowing new section: " S T U D Y OF P A R T I C U L A T E EMISSIONS FROM MOTOR VEHICLES
" SEC. 214. (a)(1) The Administrator shall conduct a study con- 42 USC 7548. cerning the effects on health and welfare of particulate emissions from motor vehicles or motor vehicle engines to which section 202 applies. Ante, pp. 702,, Such study shall characterize and quantify such emissions and ana- 751-753, lyze the relationship of such emissions to various fuels and fuel 758-761, 765; additives. •^"/"•a; Post, pp. 769, 791.
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